Gate for gravity-discharce hoppers



W J BURNETT GATE FOR GRAVITY DISCHARGE HOPPERS Filed June 4, 1926 Nov. 15, 1927.

I V], TNESSES Nov. 15,

w. J. BURNETT GATE FOR GRAVITY DISCHARGE HUPPERS Filed June 4.192s 2 Sheets-Shet 2 55F Z3 Z1 35 33 5g 3g; INVENTOR:

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f lse. 15, 192?.

WILLIAM 5. summer,

- uraoruarne oer/renew, on NEW .rEnsEY,

Application filed June 4,

This invention relates to gates forgravity discharge hoppers, more particularly hoppers adapted for reception of hot and incandescent materials, for example hot ashes from boilers of powerhouses. As aconsequence ofldirect contact with the hot and incandescent materials, gates of the lnnd referredto are apttowarp, and,'as a result, to stick to such an extent as to render their actuation extremely diilicult at times.

The main object of the present invent-ion is to overcome the drawbacks mentioned through provision for adequate cooling of the gates, and this desideratum I attain as hereinafter fully set forth, by constructing them hollow, thereby to provide channels for circulation of a suitable fluent cooling medium s ch as air or water to absorb and dissi pate the excess heat. I

A further object of my invention is to enable, in instances where quenching is practiced, cooling of the gates to be effected with the quenching water by by-passing the seepage from the hopper for circulation through the hollows of the gates.

In the drawings, Fig. I shows a side elevation of a hopper gate of the pivoted type conveniently embodying my invention/ Fig. II is a rear view of the organization, or, in other words, an elevation as seen as from the right of Fig. I. 3 f

Fig. III is across sectional view taken as indicated by the arrows III-III in Fl II.

Fig. IV is a local detail section taken as indicated by the arrows IVIV in Fig. III; and,

Fig. V is a View similar to Fig. III showing a slight modification of my invention.

lVith more specific reference to these illustrations, 1O comprehensively designates the hopper, and 11 the gate by which gravity discharge from said hopper is controlled. As shown, this gate 11 comprises a stationary outlet frame member 12 which is flanged as at 13 to enable securing thereof to the hopper discharge opening as by bolts i l; and a movable closure member 15 capable of being swung clockwise (with regard to Fig. I) to open position about a fulcrum axis jointly provided by outwardly projecting trunnions 16 that are journalled in appropriate bearings 17 afforded by the outlet frame member 12, aforesaid. The arcuate ran STATES PATENT oFF cs.

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1926. Salem. 113,631.

body portion 15'? which provides the closure surface of the movable member 15, is concern tricallycurved with respect to the fulcrum iris, and counter-balanced for stabilized movement by means of weights 18, secured to the outer ends of rearward projecting arms 19 of the sectoral side pieces, 20,20-

25 whichis sloped downwardly toward the observer in Fig. I, and normally occupies the position shown so as to discharge, by way of a spout- 26, into a gutter :27, wherefro-m the water isconduct-edto a suitable point of disposal through a conduit 28. The trough 25 is pivotally mounted to the hopper outlet member 12 at 29, and connected by a link 80 with one of the weighted arms19, so as to be automatically swung out of the way of the discharge from the hopper 10 when the gate 11 is opened.

The disclosure thus far is of a typical pivoted control gate and chosen for convenience of, illustrating the present inven-. tion, the novel features whereof I am about to describe. Instead of being constructed solid in accordance with usual practice, the

body portion 15 of the movable gate member 15 is made hollow as shown in Fig. III to permit circulation therethrough of air, water or any other suitable agent, to main tain it cool against warping under the action of heat imparted by virtue of direct contact of its closure surface with the hot and incandescent contents of the hopper 10. The hollow construction of the body portion 15 of the closure member 15 may obviously be had through integral casting of the same and resorting to coring, but I prefer to pro-- vide the same as herein shown, by forming said body portion with a facial depression and by employing a separate renewable cover plate 31 to serve as the, closure surface. The plate 31 is supported along 0pposite ends by integral outstanding flanges 32 of the body portion 15*, and intermediate its ends, by a number of embossments 33 allocated at appropriate intervals so as to brace and buttress said plate against indentation. Suitable means such as screws or bolts 34 taking into certain of theembossments may be employed to secure the plate 31 in position. In instances where quenching is practiced, I employ the construction shown in Figs. IIV from which it will be noted that the plate 31 is perforated to enable the quenching water seepage to enter the hollow of the body portion and to be thereby conducted or by-passed downwardly through the same and discharged from the lower end into the trough for disposal by way of the gutter 27 and conduit 28. Incidental to circulation through the hollow body portion 15 of the movable gate member 15, the water will obviously serve to keep the parts sufficiently cool against the contingencies hereinbefore referred to. An upturned lip at the outer end of the plate 31 serves to prevent spill of the water at that region and assists in directing the water into ai'cuate flow channels 36 (Fig. II) formed in the sectoral side frames 20 of the movable gate member 15.

The described construction is not only advantageous in that it provides for renewal of the closure surface of the gate 11 after extensive wear in use, but enables disassembling for cleaning out, from time to time, of any sediment accumulation of the ash dust in the hollow interior of the gate body portion 15.

The modified form of my invention shown in Fig. V is used when quenching is effected dry. In this case the plate 31 is imperforate and'the body portion 15 provided with a number of openings 36 for greater surface exposure of the metal and to enable air circulation freely through its hollow for the purposes of'cooling. In all other respects the modified showing is identical with the first described form, and-the corresponding parts are all identified with the same reference numerals to obviate the necessity for repetitive description.

Although I have shown and described my invention as embodied in a pivoted gate 11, the same novel features may be incorporated, with attainment of like advantages in gates of other types, and the appended claims have purposely been expressed in broad terms with this in mind.

Having thus described my invention, I claim:

1. A gate for gravity discharge hoppers comprising a body portion which provides the closure surface, said body portion hav-' ing a facial depression with a number of perforations, and a renewable imperforate face plate to form with the facial depres sion, an internal hollow for circulation of a fluent cooling medium.

2. A pivoted gate for gravity discharge hoppers comprising a shallow concentric arcuate body portion which provides the closure surface, said body portion being hollow and having a series ofopenings in its bottom for the free circulation of cooling air therethrough.

3. A pivoted gate for gravity discharge hoppers including a shalloivarcuate body portion fitted with a removable imperforate cover plate which provides the closure surface, said body portion'being hollow and the bottom face perforated to permit entry and free circulation of cooling air, in combination with means to receive and dispose of the seepage water \after disch'arge from the gate;

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this 2nd day of June, 1926. i

WILLIAM J BURNETT. 

